[#boost-urls-grammar-recycled_ptr-empty]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/grammar.adoc[grammar]::xref:boost/urls/grammar/recycled_ptr.adoc[recycled&lowbar;ptr]::empty
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:mrdocs:

Return true if this does not reference an object

== Synopsis

Declared in `&lt;https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/recycled.hpp#L406[boost&sol;url&sol;grammar&sol;recycled&period;hpp]&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
empty() const noexcept;
----

== Description

== Exception Safety
Throws nothing&period;

== Return Value

`p`_ &equals;&equals; nullptr_


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